236 CHIROPTERA noteworthy peculiarities, its general outline less narrow than in the related species. Teeth.—Inner upper incisor as in Eptesicus serotinus, but more robust in proportion to its height; outer incisor noticeably higher than in the related species, its apex reaching level of secondary cusp of larger tooth, its secondary cusp more prominent ; no marked contrast between crown areas of the two teeth; each pair in line of general curve of anterior portion of palate, instead of at right angles to main axis. Lower incisors less crowded than those of E. serotinus, their imbrication distinct but not unusual, the general outline of the row broadly V-shaped ; in form the individual teeth show no special peculiarities; ij without postero-internal tubercle. Canines and premolars with no special peculiarities. First and second upper molars essentially as in Eptesicus serotinus, but disproportion between paracone and metacone less e-vident; m' with crown area about two-thirds that of m', its longitudinal diameter through metacone slightly more than half transverse diameter, the mesostyle and metacone well developed, the second and third commissures more than half as long as first; lower molars like those of E. serotinus in form, but angles in commissures between outer and inner cusps deeper; area of second V in ™3 nearly equal to that of first. Measurements.—Adult male from Grotte de Vallorbe, Vaud, Switzerland: head and body, 68 - 5 ; tail, 47; tibia, 17; foot, 10; forearm, 38 - 2 ; thumb, 9 - 8 ; third finger, 68 ; fifth finger, 49. Forearm in adult male from Upsala, Sweden, 38-4. Three females from the same locality: forearm, 39, 39, and 39-6; third finger in the four specimens from Upsala: 66, 68, 70 and 68. For cranial measurements see Table opposite. Specimens examined.—Pif teen, from the following localities: — Norway : No exact locality, 1. Sweden: Upsala, 8 (B.M. and U.S.N.M.); Upland, 2 (U.S.N.M.). Germany : Weruigerode, Saxony, 2. Austria-Hungary : Csall6k6z-Somorja, Pressburg, 1. Switzerland : Grotte de Vallorbe, Vaud, 1 (Mottaz). Bemarks.—This species is readily distinguishable from Eptesicus serotinus by its smaller size and by the conspicuous pale tips to the hairs of back. From Vespertilio murinus, which resembles it in colour pattern, the narrow ear, more yellowish (less whitish) hair-tips on back, and slightly smaller size distinguish it super¬ ficially. Pipistrellus savii, which often has almost exactly similar coloration, is a much smaller animal (forearm, 31 to 33 instead of 38 to 40). 1. Norway. (CoUett.) E. B. Alston (p.) 81. 6. 9. 2. 4 9. Upsala, Sweden. (KoUhoff.) Lord Lilford (p). 11.1.1.39-42. 6, 9. Wernigerode, Saxony, Ger- Dr. W. Wolterstorff 0. 2. 8. 3-4. many. (c & p). 1. Csall6koz-Somorja, Press- Budapest Museum (e.) 94.3.1.14. burg, Hungary.